| 安巧霞,孙三民.不同灌水量对阿拉尔垦区棉田土壤硝态氮淋失量的影响[J].干旱地区农业研究,2009,27(3):154~157 |
| 不同灌水量对阿拉尔垦区棉田土壤硝态氮淋失量的影响 |
| Effect of different irrigation amount on NO-3-N leaching in the soil of cotton field in Alaer irrigated area |
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| DOI：10.7606/j.issn.1000-7601.2009.03.28 |
| 中文关键词: 硝态氮 淋失 灌水 棉田,阿拉尔垦区 |
| 英文关键词:NO-3-N leaching loss irrigation cotton field Alaer irrigated area |
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| 中文摘要: |
| 以阿拉尔垦区棉田为试验地点,在棉花全生育期分别设8 100、6 600、5 100、3 600 m3·hm-2 4个灌水水平,5次灌水,测定棉田0~100 cm土壤NO-3-N含量变化和灌水后105 cm处渗漏液NO-3-N浓度。结果表明,灌水对硝态氮淋失有明显的影响,在4~9月整个种植周期内,土壤浅层硝态氮浓度都呈下降趋势,深层硝态氮浓度缓慢上升;灌水量越大,深层土壤硝态氮浓度越高。在种植期间渗漏水硝态氮浓度变化趋势为:NO-3-N基本上呈现低—高—低的变化趋势,且变化幅度较大;NO-3-N淋失量为2.1821.23 kg·hm-2,与灌水量呈对数相关。 |
| 英文摘要: |
| Taking the Alar irrigated area as experiment site, we designed four irrigation treatments: 8 100, 6 600, 5 100 and 3 600 m3/hm2, and measured the content variation of NO-3-N in 0～100 cm soil and the leaching solution concentration variation of NO-3-N in 105 cm soil after 5 times of irrigation.The results showed that irrigation obviously affected NO-3-N loss.During the growing period from April to September, as time went by, NO-3-N concentration tended to go down in the upper layer of the edaphic section but increase gradually in the deeper layer;in deep soil, NO-3-N concentration tended to get higher when the amount of irrigation water was increased.The changing of NO-3-N concentration in the leakage loss was as the following: Basically the variation tendencies of NO-3-N concentrations were low-high-low and large varied amplitude;The amount of NO-3-N loss was logarithmicly related to the amount of irrigation water, and the amount of NO-3-N loss was 2.18～21.23 kg·hm-2. |
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